Mental Math
Add and take away to wake the mind
Play online — no app to installFree printable worksheets
Saerok is a brain-training playground where games that help with early dementia and mild cognitive decline are free to play. It works on a computer, a tablet or a phone, and if the screen is hard to use you can print the puzzles instead.
Download the worksheets (PDF)
Download and print straight away — no sign-up, no email. Each file holds four worksheets and the answer sheets.
These files are prepared in advance, so they always hold the same puzzles. For a fresh set every time, use “Print puzzles” on the site itself.
Five levels
- 1. First steps — Single-digit adding and taking away · answers up to 10
- 2. Gentle — Single-digit adding and taking away · fill the blank
- 3. Easy — Two digits ± one digit · fill the blank
- 4. Normal — Two digits ± two digits · fill the blank
- 5. Hard — Three-digit sums · three numbers in a row
Scoring
| Level | Only adding and taking away — Level 1 single digits with answers up to 10 · Level 2 single digits and fill-the-blank · Level 3 two digits ± one digit · Level 4 two digits ± two digits · Level 5 three digits and three numbers in a row |
|---|---|
| The numbers you add and take away | Always 2 or more. Adding or taking away 1 is never asked |
| How to answer | There is no confirm button — your answer is checked as soon as you tap it. On Levels 1–2, when the answer has two digits, two big number buttons appear so one tap is enough |
| Correct answers | Up to 600 · in proportion to correct answers |
| Time bonus | Up to 300 · only if you finish, in proportion to time left |
| Streak bonus | Up to 100 · 3 in a row 25 / 4 in a row 50 / 5 in a row 75 / 6 or more 100 |
| Wrong-answer penalty | None — a wrong answer just shows the right one and moves on |
| Level bonus | Normal +100, Hard +250 (when you finish) |
| Top score | Levels 1–3: 1,000 · Normal: 1,100 · Hard: 1,250 |
| Keyboard | On a PC, type with the number keys and erase with Backspace. Answers are checked automatically |
I went looking online for puzzles for my mother, who lives with dementia, and found it far too hard to find good ones — so I made these for her. I am putting them here in the hope that they help someone else too.